1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <chrono>
// class year_month_weekday;
// constexpr year_month_weekday operator-(const year_month_weekday& ymwd, const months& dm) noexcept;
// Returns: ymwd + (-dm).
//
// constexpr year_month_weekday operator-(const year_month_weekday& ymwd, const years& dy) noexcept;
// Returns: ymwd + (-dy).
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include <iostream>
constexpr bool testConstexprYears ()
{
std::chrono::year_month_weekday ym0{std::chrono::year{1234}, std::chrono::January, std::chrono::weekday_indexed{std::chrono::Tuesday, 1}};
std::chrono::year_month_weekday ym1 = ym0 - std::chrono::years{10};
return
ym1.year() == std::chrono::year{1234-10}
&& ym1.month() == std::chrono::January
&& ym1.weekday() == std::chrono::Tuesday
&& ym1.index() == 1
;
}
constexpr bool testConstexprMonths ()
{
std::chrono::year_month_weekday ym0{std::chrono::year{1234}, std::chrono::November, std::chrono::weekday_indexed{std::chrono::Tuesday, 1}};
std::chrono::year_month_weekday ym1 = ym0 - std::chrono::months{6};
return
ym1.year() == std::chrono::year{1234}
&& ym1.month() == std::chrono::May
&& ym1.weekday() == std::chrono::Tuesday
&& ym1.index() == 1
;
}
int main()
{
using year = std::chrono::year;
using month = std::chrono::month;
using weekday = std::chrono::weekday;
using weekday_indexed = std::chrono::weekday_indexed;
using year_month_weekday = std::chrono::year_month_weekday;
using years = std::chrono::years;
using months = std::chrono::months;
constexpr month November = std::chrono::November;
constexpr weekday Tuesday = std::chrono::Tuesday;
{ // year_month_weekday - years
ASSERT_NOEXCEPT( std::declval<year_month_weekday>() - std::declval<years>());
ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() - std::declval<years>()));
static_assert(testConstexprYears(), "");
year_month_weekday ym{year{1234}, November, weekday_indexed{Tuesday, 1}};
for (int i = 0; i <= 10; ++i)
{
year_month_weekday ym1 = ym - years{i};
assert(static_cast<int>(ym1.year()) == 1234 - i);
assert(ym1.month() == November);
assert(ym1.weekday() == Tuesday);
assert(ym1.index() == 1);
}
}
{ // year_month_weekday - months
ASSERT_NOEXCEPT( std::declval<year_month_weekday>() - std::declval<months>());
ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() - std::declval<months>()));
static_assert(testConstexprMonths(), "");
year_month_weekday ym{year{1234}, November, weekday_indexed{Tuesday, 2}};
for (unsigned i = 1; i <= 10; ++i)
{
year_month_weekday ym1 = ym - months{i};
assert(ym1.year() == year{1234});
assert(ym1.month() == month{11-i});
assert(ym1.weekday() == Tuesday);
assert(ym1.index() == 2);
}
}
}
|
